Chuck.



E. R. SIBERT.

CHUCK.,

APPLIOATION FILED 11113.18, 1910.

UNITED sTATEs PATENT oEEIoE.

ERNEST RIDGLEY SIBERT, OF COLORADO SPRINGS, COLORADO.

CHUCK.

To all whom it 'may concern:

Be it known that I, ERNEST RIDGLEY SI- nEn'r, citizen of the UnitedStates, residing at Colorado Springs, in the county of El Paso and Stateof Colorado, have invented new and useful Improvements in Chucks7 ofwhich the following is a specification.

My present invention has to do with chucks, and more particularly tochucks for use on polishing or buffing lathes.

In my Letters-Patent No. 906,315, dated December S, 1908, I disclose achuck constructed with a view of saving time when it is desired to staya tool carrier in order to examine work that is being turned or toremove a buff from the tool carrier. and replace it with a bud ofdiiferent character, the staying or stopping of the tool carrier inorder to attain the end stated being accomplished without the necessityof stopping the-lathe, which will be appreciated as an importantadvantage when it 1s remembered that where electric power is used thestart-y ing of the lathe involves the loss of considerable power.

One of the lobjects of my present invention is to provide a chuckequally as efficient as the one constituting the subject matter of myLetters-Patent aforesaid, and at the same time much more simple andinexpensive than the same.

Another object of the present invention is the provision of meanswhereby when occasion demands the tool carrier of the chuck may bedetachably fixed to the shift sleeve thereof, this with a view ofpreventing the tool carrier going into operatione., being turned by thearbor when a tool is fixed on the tool carrier in such a manner as tomake necessary the use of a wrench or the like to loosen and remove thesaid tool. l/Vith the foregoing in mind the novelty, utility andpractical advantages of the present invention will be fully understoodfrom the following description and claims when the same are taken inconnection with the drawings, accompanying and forming partVspecification of Letters Patent.

Patented Oct. 25, 1910.

Application filed March 18, 1910. Serial No. 550,097.

A is the arbor of my improved chuck, which is designed to be constantlyrotated while the lathe or other machine embodying my improvements is inuse.

B is a tool carrier which is shown specifically as a buff carrier, and Cis a shift sleeve-z'. c., a sleeve having to do with putting the toolcarrier into and out of working connection with the arbor, so that inone position the tool carrier derives rotary motion from the arbor, andin another position said tool carrier remains idle while the arborcontinues to rotate.

As shown in Fig. 2, the arbor A is adapted for connection to the latheelement from -which it is to derive motion, and is provided with thefollowing features, to wit: an oil cup an oil duct c extending from cupZ) to the side of the arbor and designed to lead oil to the washer m,presently described, a circumferential flange al located in rear of theeduction orifice of the oil duct c, and a slightly tapered forward ende.

The tool carrier B is provided with a socket f the forward portion ofwhich is tapered as indicated by g to coperate with portion 7L and witha rear exteriorly threadved portion z', the latter terminating at itsrear end in a longitudinal projection or reduced portion j, which I willhereinafter denominate the bank pin.

The shift sleeve C Vmay be of any construction consonant with thepurpose of my present invention, though I prefer to have it comprise asection 7e, interiorly threaded at Z to engage the exterior thread z' ofthe tool carrier B, and exteriorly threaded at fm, tuo engage theinterior thread n of a section p, which section p extends rearwardlybeyond the arbor flange l and is there provided with an inwardlydirected fiange r which The tool loosely surrounds the arbor A. Thus itwill shift sleeve C on the arbor. IVith a view of preventing cutting orfrictional wear of the parts and at the same time ada-pt the chuck tooperate in a practically noiseless manner, I prefer to interpose hardfiber washers s between the arbor flange (Z and the two parts Zt and frof the shift sleeve.

D is a washer, of hard felt or other suitable hard absorbent material,which surrounds the arbor and the eduction orifice of the oil duct c,and is snugly interposed between the arbor and the part` Z of shiftsleeve C. The said washer D serves to supply the inclosed parts with oilso as to render the chuck self-lubricating for an indefinite period, andalso serves to frictionally transmit motion to the shift sleeve C.

l is a projection which extends inwardly from the part Z: of the shiftsleeve C and is arranged in the same transverse plane as the` bank pin jof the tool carrier B, and is designed to cooperate with the said pin jin the manner and for the purpose hereinafter set forth. The saidprojection E is preferably in the form of a screw which is threadedthrough the parts p and c of the shift sleeve to connectI the said partsand extends inwardly from the part to engage the bank pin F, Fig. 3, isan auxiliary screw which is arranged in the same transverse plane as thebank pin screw E, and is carried by the parts 7n and y; of the shiftsleeve. Normally the said screw F rests out of the path or orbit of thebank pin but when it is desired for any purpose to fix the tool carrier3 to the shift sleeve C, the screw F is turned inwardly so as to causethe same to rest at the opposite side of the bank pin y', with referenceto the projection or screw E, when, as will bc readily manifest, rotarymovement of the tool carrier B in the shift sleeve C will be prevented,and consequently the sleeve C cannot operate to draw the tool carrierinto frictional connection with the arbor.

In the practical operation of my novel chuck, it will be observed thatthe washer D serves for the frictional transmission of motion from thearbor A to the shift sleeve C, and the interior thread of the said shiftsleeve serves in combination with the thread z' of the tool carrier B todraw the said tool carrier toward the left so as to engage said toolcarrier with the arbor at the friction portion e thereof, and in thatway assure the shift sleeve and the tool carrier turning with the arbor.IVhen, however, the shift sleeve C is stayed or stopped, as by themachine attendant grasping and holding the same against rotation, thetool carrier is enabled to turn a limited distance within the shiftsleeve and sufficiently far to carry said tool carrier out of frictionalengagement with the arbor portion c. This will leave l l l the toolcarrier B at rest while the arbor A continues to rotate, and while saidtool earrier is at rest a buff may be removed from the carrier andreplaced with a buff of different character, or else the work that isbeing done may be examined. Then upon the release of the shift sleeve Cand the rotation of same through the medium of the washer D, the toolcarrier B will be drawn toward the left and into frictional connectionwith the arbor, and will be caused to turn with the arbor as firststated. lllhen the tool carrier turns in and with respect to the shiftsleeve C in the manner before described, it will be observed thaty thesaid tool carrier will move forwardly until the bank pin j engages withthe bank pin screw E.

In the event of the buff becoming fixed on the taper screw of thecarrier B in such manner that the buff cannot be removed by hand, theoperator while continuing to stay the shift sleeve C, turns theauxiliary screw F inwardly so as to cause the said auxiliary screw toassume a position at the opposite side of the pin '7 and directly behindthe said pin j. This will obviously prevent the carrier B being` againrotated until the screw F is returned to its normal position shown inFig. 3, and while the tool carrier is locked in the manner stated to theshift sleeve, the buffn may be removed from the tool carrier through themedium of a wrench or other suitable implement.

Having described my invention, what I claim and desire to secure byLetters-Patent, is: v

l. In a chuck, the combination of an arbor, a shift sleeve frictionallyrotated from the arbor and having a thread and also having a projection,and a device adapted to be moved into and out of frictional connectionwith the arbor and having a thread engaging the thread of the shiftsleeve and also having a bank pin for cooperating with the saidprojection of the shift sleeve.

2. In a chuck, the combination of an arbor, a shift sleeve frictionallyrotated from the arbor and having a thread and also having a projection,a device adapted to be moved into and out of frictional connection withthe arbor and having a thread engaging the thread of the shift sleeveand also having a pin for cooperating with the said projection of theshift sleeve, and an adjustable device carried by the shift sleeve andadapted in one position to rest out of the path of the bank pin and inanother position to rest adjacent the bank pin and behind the same.

3. In a chuck, the combination of an arbor having a circumferentialflange and also having a forward taper portion, a friction washersurrouliding the arbor, an endwise movable and rotary device having ataper socket receiving the taper portion of the arbor and also having athread and a bank pin, and a shift sleeve comprising connected partsdisposed at opposite sides of the circumferential flange of the arborand having a thread engaging that of the said endwise movable device andalso having an inwardly extending projection adapted to cooperate withthe bank pin of the device.

4L. In a chuck, the combination of an arbor having a circumferentialflange and also having a forward taper portion, a friction washersurrounding the arbor, an endwise movable and rotary device having ataper socket receiving the taper portion of the arbor and also having athread and a bank pin, a shift Sleeve comprising connected partsdisposed at opposite sides of the flange on the arbor and having athread engaging that of the said endwise movable device and also havingan inwardly extending projection adapted to coperate with the bank pinof the device, and an auxiliary screw carried by the shift sleeve andadapted in one position to rest adjacent the bank pin and at theyopposite side thereof to the projection on the shift sleeve.

In testimony whereof I have hereunto Set my hand in presence of twoSubscribing witnesses.

ERNEST RIDGLEY SIBERT.

Witnesses Giras. F. BIRDSALL, E. KLOEPFER.

